Measurement of geometric dephasing using a superconducting qubit
Berger S, Pechal M, Kurpiers P, Abdumalikov AA, Mlynek JA, Shnirman A, Gefen Y, Wallraff A, Filipp S, Eichler C (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 6
Article Number: 8757
DOI: 10.1038/ncomms9757
Abstract
A quantum system interacting with its environment is subject to dephasing, which ultimately destroys the information it holds. Here we use a superconducting qubit to experimentally show that this dephasing has both dynamic and geometric origins. It is found that geometric dephasing, which is present even in the adiabatic limit and when no geometric phase is acquired, can either reduce or restore coherence depending on the orientation of the path the qubit traces out in its projective Hilbert space. It accompanies the evolution of any system in Hilbert space subjected to noise.
Authors with CRIS profile
Involved external institutions
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Switzerland (CH)
Karlsruhe Institute of Technology (KIT)
Germany (DE)
Weizmann Institute of Science
Israel (IL)
Switzerland (CH)
Karlsruhe Institute of Technology (KIT)
Germany (DE)
Weizmann Institute of Science
Israel (IL)
How to cite
APA:
Berger, S., Pechal, M., Kurpiers, P., Abdumalikov, A.A., Mlynek, J.A., Shnirman, A.,... Eichler, C. (2015). Measurement of geometric dephasing using a superconducting qubit. Nature Communications, 6. https://doi.org/10.1038/ncomms9757
MLA:
Berger, S., et al. "Measurement of geometric dephasing using a superconducting qubit." Nature Communications 6 (2015).
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